DE112014003346T5 - Terminal connection structure - Google Patents

Abstract

An insertion port (12) has an insertion terminal body (21) in the form of a flat plate, and a tongue fitting portion (22) extending from the front end of the insertion port body (21) in the direction to connect the insertion port (21). 12) with a receiving port (13) in the same plane as the insertion port body (21). The female terminal (13) has a flat plate receiving terminal body (31) and a pair of contact terminal portions (32) extending from the front end of the female terminal body (31) in the direction to connect the female terminal (13) with the insertion port (12) in the same plane as the receiving terminal body (31).

Description

Technical area

The present invention relates to a terminal connection structure.

Technical background

In general, for a wire harness connected to an electronic device such as a rear view camera or a car navigation device in a vehicle such as a car, a connector having a box-shaped terminal, a cantilever spring terminal, or the like is used The like is provided. The box-shaped connector is insensitive to vibration, but is not suitable for high-speed digital transmission at a rate of several Gbps. Furthermore, the cantilever spring terminal is suitable for high-speed digital transmission, but the occurrence of temporary interruption or contact failure due to vibration is a problem.

In this connection, a terminal connection structure is under development consisting of a tuning fork-shaped female terminal more resistant to vibration than the cantilever spring terminal and more suitable for high-speed digital transmission than the box-shaped terminal, and an insertion terminal connected to the female terminal becomes (see the patent documents 1 and 2). The tuning fork-shaped female terminal obtains a tuning fork-like shape by press-forming a pair of contact terminal portions in the form of cantilever springs facing each other in the female terminal body having the shape of a plane surface. In the tuning fork-shaped female terminal, a tongue terminal portion of the insertion terminal in which the plate-shaped tongue terminal portion is formed in the insertion terminal body having the shape of a flat plate is inserted between the contact terminal portions of the tuning fork-shaped female terminal such that the tongue Terminal portion between the contact terminal portions is clamped and electrically connected to them.

Prior Art Documents Patent Documents

• Patent Document 1 JP-A-2000-40563
• Patent Document 2 Japanese Patent No. 3414402

Summary of the invention

Technical problem

• 1) An einem Punkt, an dem der stimmgabelförmige Aufnahmeanschluss und der Einführanschluss in Kontakt miteinander kommen, ist der Zungen-Anschlussabschnitt des Einführanschlusses senkrecht zu einer Ebene angeordnet, an der der Aufnahmeanschluss-Körper ausgebildet ist. Wenn der Aufnahmeanschluss-Körper, der die plane Hauptfläche des Aufnahmeanschlusses bildet, und der Zungen-Anschlussabschnitt, der die plane Hauptfläche des Einführanschlusses bildet, relativ zueinander um ungefähr 90° gedreht werden, kann ein Fall eintreten, in dem bei digitaler Hochgeschwindigkeitsübertragung keine guten elektrischen Eigenschaften erzielt werden.
• 2) An einem Punkt, an dem der stimmgabelförmige Aufnahmeanschluss und der Einführanschluss miteinander in Kontakt kommen, besteht dahingehend ein Problem, dass, wenn die Breite, die Dicke der Kontakt-Anschlussabschnitte des Aufnahmeanschlusses und des Zungen-Anschlussabschnitts des Einführanschlusses und dergleichen variieren, möglicherweise Impedanz-eigenschaften und S-Parameter variieren, die davon abhängen. Daher kann ein Fall eintreten, in dem bei digitaler Hochgeschwindigkeitsübertragung keine guten elektrischen Eigenschaften erzielt werden.

However, the terminal connection structure consisting of the tuning fork-shaped receiving port and the insertion port fitting and connecting thereto has the following problems.

• 1) At a point where the tuning fork-shaped female terminal and the insertion terminal come into contact with each other, the tongue terminal portion of the insertion terminal is disposed perpendicular to a plane on which the female terminal body is formed. When the female terminal body forming the plane main surface of the female terminal and the tongue terminal portion forming the planar main surface of the insertion terminal are rotated approximately 90 degrees relative to each other, a case may occur in which high-speed digital transmission does not provide good electric Properties are achieved.
• 2) At a point where the tuning fork-shaped female terminal and the insertion terminal come into contact with each other, there is a problem that when the width, the thickness of the contact terminal portions of the female terminal and the tongue terminal portion of the insertion terminal and the like vary Impedance characteristics and S parameters vary depending on it. Therefore, there may be a case where good electrical characteristics are not obtained in high-speed digital transmission.

The present invention has been made in consideration of the above-mentioned circumstances, and an object thereof is to provide a terminal connection structure which enables high-speed digital transmission and good electrical characteristics can be obtained.

the solution of the problem

• 1) Die Anschluss-Verbindungsstruktur, wobei die Anschluss-Verbindungsstruktur einen Einführanschluss mit einem Aufnahmeanschluss verbindet, und der Einführanschluss umfasst: einen Einführanschluss-Körper, der in Form einer flachen Platte ausgebildet ist; und einen Zungen-Anschlussabschnitt, der sich von einem vorderen Ende des Einführanschluss-Körpers aus in einer Richtung zur Verbindung mit dem Aufnahmeanschluss in der gleichen Ebene erstreckt wie der Einführanschluss-Körper, wobei der Aufnahmeanschluss umfasst: einen Aufnahmeanschluss-Körper, der in Form einer flachen Platte ausgebildet ist; sowie ein Paar Kontakt-Anschlussabschnitte, die sich von einem vorderen Ende des Aufnahmeanschluss-Körpers aus in einer Richtung zur Verbindung mit dem Einführanschluss in der gleichen Ebene erstrecken wie der Aufnahmeanschluss-Körper, und wobei der Zungen-Anschlussabschnitt des Einführanschlusses zwischen den paarigen Kontakt-Anschlussabschnitten des Aufnahmeanschlusses in der gleichen Ebene wie der Ebene positioniert ist, in der sich die Kontakt-Anschlussabschnitte erstrecken, und der Zungen-Anschlussabschnitt an den paarigen Kontakt-Anschlussabschnitten anliegt.
• 2) Die Anschluss-Verbindungsstruktur gemäß 1), wobei Kontaktabschnitte, die in Richtungen vorstehen, in denen sie einander zugewandt sind, in den Kontakt-Anschlussabschnitten ausgebildet sind.
• 3) Die Anschluss-Verbindungsstruktur gemäß 1) oder 2), wobei Eingriffsvorsprünge, die an den Kontakt-Anschlussabschnitten anliegen, in dem Einführanschluss-Körper ausgebildet sind.
• 4) Die Anschluss-Verbindungsstruktur gemäß 3), wobei die Eingriffsvorsprünge umfassen: Führungsflächenabschnitte, die vordere Endabschnitte der Kontakt-Anschlussabschnitte zur Seite des Zungen-Anschlussabschnitts hin verschieben.

In order to achieve the object, the terminal connection structure according to the present invention has the following features 1) to 4).

• 1) The terminal connection structure, wherein the terminal connection structure connects an insertion terminal to a female terminal, and the insertion terminal includes: an insertion terminal body formed into a flat plate shape; and a tongue terminal portion extending from a front end of the insertion port body in a direction for connection with the female terminal in the same plane as the insertion terminal body, the female terminal comprising: a female terminal body formed in a shape of a female terminal flat plate is formed; and a pair of contact terminal portions extending from a front end of the female terminal body in a direction to be connected to the insertion terminal in the same plane as the female terminal body, and the tongue terminal portion of the insertion terminal is interposed between the paired terminal lands. Terminal portions of the female terminal is positioned in the same plane as the plane in which the contact terminal portions extend, and the tongue terminal portion abuts the paired contact terminal portions.
• 2) The terminal connection structure according to 1), wherein contact portions projecting in directions in which they face each other are formed in the contact terminal portions.
• 3) The terminal connection structure according to 1) or 2), wherein engagement projections abutting the contact terminal portions are formed in the insertion terminal body.
• 4) The terminal connecting structure according to 3), wherein the engaging projections include: guide surface portions that shift front end portions of the contact terminal portions toward the tongue terminal portion side.

In the terminal connection structure having the structure in FIG. 1), since the insertion terminal and the receiving terminal are arranged in the same plane and fitted together so as to come in contact with each other, the characteristic impedance is substantially constant. As a result, ideal electrical properties are achieved substantially without reflections at a contact point of the insertion port and the receiving port.

Further, while in a terminal connection structure having the related art tuning fork-shaped female terminal, current that carried a signal flows over a path directed toward the center of the insertion terminal from the ends of a tuning fork-shaped female terminal of the terminal connection structure of the present invention, current carrying a signal via a straight path connecting the insertion port and the receiving port. This contributes to preventing the deterioration of the electrical characteristics.

In the terminal connection structure of the present invention, the insertion terminal and the receiving terminal may be regarded as differential stripline type transmission lines. In the terminal connection structure of the present invention, a change of the physical shape at the point where the insertion terminal and the receiving terminal are fitted together is restricted. Due to the small change in the physical shape, excellent electrical properties result.

In the terminal connection structure having the structure in FIG. 2), when the insertion terminal and the accommodation terminal are fitted with each other, the contact portions formed in the contact terminal portions of the accommodation terminal come into contact with the tongue terminal portion of the insertion terminal, and so can a good Line state can be achieved.

In the terminal connection structure having the structure in FIG. 3), when the insertion terminal and the accommodation terminal are fitted with each other, the contact terminal portions of the accommodation terminal abut on the engagement projections of the insertion terminal. Accordingly, a shape is achieved which is advantageous for the characteristics of a high frequency wave propagating over the surface or edge of a transmission line.

In the terminal connecting structure having the structure in FIG. 4), when the insertion terminal and the receiving terminal are fitted with each other, the front ends of the contact terminal portions of the female terminal are shifted toward the tongue terminal portion side by guide surface portions of the engagement projections. Accordingly, the contact terminal portions are pressed and come into close contact with the tongue terminal portion, and thus reliable conduction is achieved.

Advantageous Effects of the Invention

According to the present invention, a terminal connection structure can be provided which enables high-speed digital transmission and with which good electrical characteristics can be obtained.

Thus, the present invention has been briefly described. Hereinafter, in reading the following description of embodiments for practicing the invention (hereinafter referred to as "embodiments"), the details of the present invention will become more apparent with reference to the accompanying drawings.

Brief description of the drawings

1 FIG. 10 is a perspective view illustrating a terminal connection structure according to an embodiment before fitting. FIG.

2 (a) and 2 B) FIG. 11 is views illustrating the terminal connection structure according to the embodiment, wherein FIG 2 (a) is a perspective view in the course of mating and 2 B) is a perspective view when mating.

3 (a) and 3 (b) are diagrams that show the waveforms of harmonics.

4 is a schematic sectional view illustrating the structure of a conventional coaxial cable.

5 is a schematic sectional view illustrating the structure of a conventional circuit board.

6 is a perspective view of a connection point of the coaxial cable and the circuit board.

7 (a) and 7 (b) are views showing the impedance of a port, where 7 (a) is a schematic view showing the impedance of the coaxial cable, and 7 (b) Fig. 12 is a schematic view showing the impedance of a microstrip line.

8 (a) and 8 (b) FIG. 12 shows TDR waveforms representing the impedance characteristic at a connection point in a case where the coaxial cable and the microstrip line are connected to each other. FIG 8 (a) shows the impedance characteristic seen from the coaxial cable and 8 (b) shows the impedance characteristic as seen from the microstrip line.

9 Fig. 10 is a schematic structural view showing a presupposed model of a transmission line.

10 (a) to 10 (e) FIGS. 11 and 13 are views showing results of impedance checking when fitting an insertion port and a tuning fork-shaped receiving port, and FIGS 10 (a) to 10 (e) FIG. 15 is views of the fitting state of the insertion port and the receiving port and the impedance in a state in which the arrangement, posture and the like of the terminal connection structure are changed.

11 Fig. 12 is a perspective view showing the model dimensions of the terminal connection structure formed by the insertion terminal and the tuning fork-shaped accommodation terminal.

12 is a schematic sectional view illustrating a differential stripline.

13 FIG. 15 is a view showing the fitting state of the terminal connection structure according to the embodiment and the impedance characteristic. FIG.

Description of embodiments

Hereinafter, examples of embodiments according to the present invention will be described with reference to the drawings.

Structure of the receiving connection and the insertion connection

First, a terminal connection structure of an embodiment according to the present invention will be described. 1 FIG. 10 is a perspective view illustrating the terminal connection structure according to the embodiment before fitting. FIG. 2 (a) and 2 B) FIG. 11 is views illustrating the terminal connection structure according to the embodiment, wherein FIG 2 (a) is a perspective view in the course of mating and 2 B) is a perspective view when mating.

A connection connection structure 11 According to the embodiment, as in 1 shown, from an insertion port 12 and a female connector 13 , The insertion connection 12 and the recording connection 13 are formed by molding on a conductive metal plate made of copper, a copper alloy or the like. The surfaces of the insertion port 12 and the receiving connection 13 which are formed can also be plated with tin, gold, nickel or the like. Furthermore, the insertion port 12 and the recording connection 13 of the present invention are not limited to the absence or presence of a surface treatment such as plating and are not limited in the type of surface treatment when the surface treatment is performed. The rear end portions of the insertion port 12 and the receiving connection 13 are provided with connecting portions (not shown). The cable of a wiring harness is connected to the connection portion. The insertion connection 12 and the recording connection 13 are housed in housings that form connectors. When the connectors are mated, the insertion port becomes 12 and the recording connection 13 electrically connected to each other.

The insertion connection 12 includes an insertion port body 21 and a tongue connection section 22 , The insertion port body 21 is how in 1 shown formed in the form of a flat plate. The tongue connection section 22 is at the front end portion of the insertion port body 21 formed and extends from the central portion of the front end of the insertion port body 21 out. The tongue connection section 22 has a smaller width dimension than the insertion port body 21 , The tongue connection section 22 is formed in the same plane as that of the insertion port body 21 , At the insertion port 12 are engagement projections 23 on both sides of the tongue connection section 22 at the front end of the insertion port body 21 educated. The engagement projections 23 are with guide surface sections 24 provided, which are adapted to the rear end of the insertion 12 gradually slope to the side of the middle in the width direction.

The recording connection 13 contains a receiving connection body 31 and a pair of contact terminal portions 32 , The reception connection body 31 is formed in the form of a flat plate, and the paired contact terminal portions 32 are integral with the side of the front end of the female terminal body 31 educated. Each of the contact terminal sections 32 is in the same plane as that of the receiving connection body 31 educated. The contact connection sections 32 extend from both ends of the front end of the female terminal body 31 out to the front end. The width dimensions of the contact terminal sections 32 take from the receiving connection body 31 gradually towards the front end. The contact connection sections 32 diverge in the direction of the front end. The contact connection sections 32 have contact sections 33 on, which are formed near the front end thereof. The contact sections 33 Stand where the contact sections 33 facing each other, facing inwards. The gap between the contact sections 33 located respectively at the contact terminal portions 32 are slightly smaller than the width dimension of the tongue terminal portion 22 of the insertion port 12 , The contact sections 33 have rejuvenation sections 34 on the side of the front end of the contact terminal sections 32 are formed. The rejuvenation sections 34 extend in the direction of the side of the rear end of the contact terminal portions 32 too oblique in a direction in which they approach each other. The front end portion of each of the contact terminal portions 32 is formed in an arched shape.

The following is a structure for interfitting and electrically connecting the insertion port 12 and the receiving connection 13 described.

In a state where the tongue connection section 22 of the insertion port 12 to the side of the contact terminal section 32 of the recording connection 13 directed, the insertion can 12 and the recording connection 13 approach each other. The front end portion of the tongue terminal portion 22 of the insertion port 12 then comes in contact with the rejuvenation sections 34 of the recording connection 13 , and the tongue connection section 22 is between the paired contact terminal sections 32 guided.

When the insertion port 12 and the recording connection 13 can approach each other, as in 2 (a) shown, the tongue connection section 22 of the insertion port 12 between the contact terminal sections 32 of the recording connection 13 introduced. Accordingly, the lateral surfaces of the tongue terminal portion come 22 of the insertion port 12 in contact with the contact sections 33 the contact terminal sections 32 ,

When the insertion port 12 and the recording connection 13 can approach each other, as in 2 B) shown, the tongue connection section 22 of the insertion port 12 between the contact terminal sections 32 of the recording connection 13 further introduced. Accordingly, the front end portion of the tongue terminal portion comes 22 of the insertion port 12 in contact with the side surfaces of the contact terminal portions 32 of the recording connection 13 , Furthermore, the front end portions of the contact terminal portions strike 32 of the recording connection 13 at the engagement projections 23 at the side of the front end of the insertion port body 21 of the insertion port 12 are formed. Accordingly, the front end portions of the contact terminal portions become 32 of the recording connection 13 through the guide surface sections 24 the engagement projections 23 shifted in the width direction to the side of the middle, so that the contact portions 33 to the lateral surfaces of the tongue connection section 22 be pressed and come in close contact with them.

Furthermore, when the insertion port 12 and the recording connection 13 as described above, mated and connected together, the insertion port 12 and the recording connection 13 at a plurality of points in the same plane in contact with each other and are electrically connected.

Effects and effects of the present invention

Hereinafter, the effects and effects of the present invention will be described based on analysis results of an electromagnetic simulation analysis.

Elements analyzed by electromagnetic simulation analysis

First, elements will be described as an object to be analyzed by the electromagnetic simulation analysis. In a connector used for high-speed digital transmission at a rate of several Gbps, stability of electrical characteristics such as impedance matching or reduction of return loss is urgently required. For example, if the impedance differs by 25 Ω from a setpoint of 100 Ω, the return loss is approximately 19 dB, and an input signal is transmitted at a loss of approximately 10 percent. If such a case occurs at a plurality of points, the loss continues to increase. Therefore, attenuation occurring at a connection point such as a connector must be reduced as much as possible.

Further, in a line for high-speed digital transmission, the dielectric loss (ohmic loss inherent in a material at a high frequency) becomes dominant in a cable cross-section, and much of the loss in a transmission system is caused by the dielectric loss. That is, when the high speed digital transmission line is extended, most of the attenuation is caused by the cable.

When performing electromagnetic simulation analysis on a connector used for high-speed digital transmission as an object, the loss due to impedance mismatch and dielectric loss must be taken into account. Therefore, in the electromagnetic simulation analysis such losses are calculated by means of an operation. The following is an expression for calculating the energy loss due to an impedance mismatch as well as a Calculation expression is provided, with which an acceptable value of the change of impedance at a connection portion, which is acceptable for the entire transmission line, determined by the degree of signal attenuation in the transmission line due to the dielectric loss. The calculation terms are used in the electromagnetic simulation analysis.

Calculation of energy loss due to impedance mismatch

Without performing waveform shaping using filters, amplification, or the like, and without performing multi-level signaling, a limit bit rate when transmitting in a so-called differential pair of metal transmission lines is about 10 Gbps. It is believed that a higher transmission rate is in a range of optical communication. In the following description, a general definition is referred to in a case of transmission at a bit rate of 10 Gbps.

A fundamental at 10 Gbps has a frequency of 5 GHz, and a waveform resulting from overlapping odd harmonics such as a third harmonic or a fifth harmonic is called a signal waveform at 10 Gbps. An image of signal waveforms is in 3 (a) and 3 (b) shown.

In 3 (a) if the waveform of the fundamental is represented by line L1, the third harmonic waveform is shown by line L3, the fifth harmonic waveform is shown by line L5, and the seventh harmonic waveform is shown by line L7. Further, the waveform of the combination of the fundamental wave and the third harmonic is shown with line L13, the waveform of the combination of the fundamental wave and the third harmonic and the fifth harmonic is shown with line L135, and is the waveform of the combination of the fundamental wave and the third harmonic, the fifth harmonic and the seventh harmonic represented by line L1357. Furthermore, the angles of elevation of lines L13, L135 and L1357 are in 3 (a) (areas enclosed by dashed lines) in an in 3 (b) enlarged diagram shown.

The number of combined odd-numbered harmonics (3, 5, and 7-fold) decreases, as in 3 (a) and 3 (b) shown, and the slope gets a steeper slope. This means that the rise time of a square wave signal specifies the band of harmonics contained in the square wave.

The fundamental wave has, as in 3 (a) and 3 (b) 5 GHz, and the third harmonic, fifth harmonic, and seventh harmonic frequencies that are harmonic components of odd multiples thereof are 15 GHz, 25 GHz, and 35 GHz, respectively. From this, a "band required for the maximum odd-numbered harmonic in a case where a square wave is given" is detected, and the rise time can be given from the band. The terms below include an expression that determines the third harmonic rise time, an expression that determines the fifth harmonic rise time, and an expression that determines the seventh harmonic rise time. Expression 1

That is, a required band varies depending on the rise time of a required signal. That is, it is determined whether to consider the third harmonic, to consider the fifth harmonic, or to consider the seventh harmonic.

Of course, when a transmission rate is increased, the length of one bit is reduced. When a bit length is reduced, the time available for increase is reduced, and therefore a steeper increase required. In order to realize a steep rise, the magnitude of odd-numbered harmonics to be considered must also be increased.

Further, as a frequency increases, attenuation in a transmission line increases. As described above, a high-frequency signal is constituted by a composite wave consisting of the first harmonic, which is the fundamental wave, and an odd-numbered harmonic. The amplitude of the third harmonic or the fifth harmonic becomes as shown 3 (a) and 3 (b) can be seen, compared to the fundamental wave significantly reduced. That is, the fundamental wave is attenuated, the composite wave itself is reduced, thereby attenuating the third harmonic and the fifth harmonic. It is apparent, as described above, that the amplitude level (amount of attenuation) of the fundamental wave is significantly related to the shape of a signal.

f:

Frequenz [GHz]

tanδ:

dielektrische Verlusttangente

ε_r:

Dielektrizitätskonstante

a:

Radius des inneren Leiters

b:

Radius des äußeren Leiters

λ:

Wellenlänge

"Damping the signal" is used in the following terms with reference to a coaxial cable 40 described how it is in 4 is shown. In 4 contains the coaxial cable 40 an inner conductor 41 , an insulator 42 , which is the outer circumference of the inner conductor 41 covering, as well as an outer conductor 43 , which is the outer circumference of the insulator 42 covers. Expression 2

f:

Frequency [GHz]

tans:

dielectric loss tangent

ε _r:

permittivity

a:

Radius of the inner conductor

b:

Radius of the outer conductor

λ:

wavelength

The sum of "conductor loss" and "dielectric loss" in the above expressions is the measure of signal attenuation in an ideal transmission line (a fully impedance matched transmission line). When 5 GHz, that is, the frequency of the fundamental wave, and the relative dielectric constant as well as the dielectric loss tangent of the insulator 42 of the coaxial cable 40 are used in the above expressions, the amount of stress loss per unit length can be calculated.

For example, since polytetrafluoroethylene (PTFE), which is a fluoroplastic, is used for the insulator of a conventional coaxial cable, the relative dielectric constant thereof is about 2.0 and the dielectric loss tangent thereof is about 0.0002. Furthermore, if a radius a of the inner conductor 41 and a radius b of the outer conductor 43 of the coaxial cable 40 based on the relationship between the thickness of the inner conductor 41 , which is given in AWG (American wire gauge), the characteristic impedance of the coaxial cable 40 and the conductor loss of the inner conductor 41 be determined, an overall measure of the loss determined as follows.

Expression 3

• Inverse calculation of the outer conductor dimensions from the impedance of the coaxial cable

• b = 0.75 mm
• a = 0.2295 mm

• Calculation of conductor loss based on dimensions of the coaxial cable

• Dielectric loss

• total loss

• Loss = a _c + a _d = 1.4437 + 0.1287 ≈ 1.5724 (dB / m)

As a result, assuming transmission in a 5 m cable with a conductor diameter of # 26 AWG, using PTFE as the insulator of the transmission line, the loss is five times 1.5724 dB / m, and one Attenuation of 7.862 dB occurs at the fundamental.

This calculation is performed for the frequency of a required odd harmonics, the loss at the frequency of 15 GHz of the third harmonic is 2.8866 dB / m, the loss at the frequency of 25 GHz of the fifth harmonic is 3.8716 dB / m, and the loss at the frequency of 35 GHz of the seventh harmonic is 4.7205 dB / m. Furthermore, if more than 5 m transmission is assumed, the third harmonic is attenuated by 14.433 dB, the fifth harmonic is attenuated by 19.358 dB and the seventh harmonic is attenuated by 23.603 dB,

As far as the degree of attenuation of each of the odd-numbered harmonics is concerned, the fifth harmonic and the seventh harmonic are attenuated by about 20 dB. Since the amplitude at the attenuation is reduced to 1/100, it can be said that the fifth harmonic or the seventh harmonic may not be considered in a case assuming a 5 m long transmission line. In contrast, the fundamental and third harmonics are attenuated by 15 dB or less. If such a degree of attenuation is achieved, if the thickness of the conductor is increased as compared to No. 26 AWG, as provided herein, or the dielectric properties are improved compared to PTFE, transmission can be achieved with a lower degree of attenuation be achieved.

Therefore, as the harmonic forming a rectangular wave for transmission at a rate of 10 Gbps, 5 GHz (first harmonic), that is, the fundamental frequency, up to the third harmonic at a frequency of 15 GHz, can be considered can.

Calculation of acceptable value of impedance change in electromagnetic simulation analysis

Preferably, the impedance in a transmission line is constant. However, in a real transmission line, a signal from a transmission side is transmitted to a reception side via various transmission lines, such as a connection portion of a cable or a connector, printed wiring on a circuit board or the like. Furthermore, a portion in which the shape or type of such a transmission line changes necessarily depends on deviating impedance. This in 4 shown coaxial cable and a microstrip line differ from each other in terms of the planned impedance magnitude and the three-dimensional shape, and therefore, it is difficult to keep the impedance at a constant level in a portion where the type of transmission line changes. The following describes an expression for calculating the impedance of the coaxial cable and a term for calculating the impedance of the microstrip line.

Expression for calculating the impedance of the coaxial cable

Expression 4

The term for calculating the impedance of the coaxial cable uses the same principle as the coaxial cable used in the description above regarding the loss. When the same dimensions and dielectric constant (a = 0.459 mm, b = 1.5 mm, ε _r = 2.0) are used, the coaxial cable made of wire No. 26 AWG has a characteristic impedance of 50.24 Ω.

Expression for calculating the impedance of the microstrip line

Expression 5

In the expression for calculating impedance of the microstrip line, as in 5 The dimensions of the simplest printed circuit board transmission line are calculated based on the following conditions. In a microstrip line 50 in 5 there is a signal line 51 on the upper surface of an insulator 52 , and a mass 53 is located on the lower surface of the same.

calculation conditions

• 1) The aim is a characteristic impedance of 50 Ω.
• 2) The diameter (0.459 mm) of the inner conductor 41 of the coaxial cable 40 and the width of the signal line 51 the microstrip line 50 are approached.
• 3) The relative dielectric constant of the insulator 52 is set to ε _r = 4.5 of FR4, which is a common material for printed circuit boards.

Under these conditions, for the thickness (h) of the insulator 52 with which a characteristic impedance of 50 Ω is approximated, determined to be 0.275 mm. The characteristic impedance is 50.2 Ω and thus essentially corresponds to the characteristic impedance of the coaxial cable 40 ,

The microstrip line 50 (please refer 5 ), which is performed with the dimensions and material properties (relative dielectric constant) determined here, is achieved with the coaxial cable 40 (please refer 4 ), and the characteristic impedance for a case where the shape of the transmission line is checked by time domain reflectometry (TDR) analysis. The results are explained with reference to 6 to 8 (b) described.

6 FIG. 15 is a perspective view illustrating a state in which the coaxial cable and the microstrip line are connected to each other. FIG. The coaxial cable and the microstrip line used in 6 are transmission lines that have substantially the same characteristic impedance and have completely different shapes. For the transmission lines, the value of the characteristic impedance at each terminal is determined as follows. That is, in a cross section of the coaxial cable near the exposed inner conductor 41 as he is in 7 (a) is shown, the value of the characteristic impedance is 50.27 Ω. In a cross section of the microstrip line near the exposed inner conductor 41 as he is in 7 (b) On the other hand, the value of the characteristic impedance is 50.57 Ω. These values differ slightly from those calculated using the above calculation expressions.

Furthermore, ask 8 (a) and 8 (b) TDR waveforms showing the impedance characteristic at a connection point in a case where the coaxial cable and the microstrip line having substantially the same characteristic impedance are connected to each other. In a case where the characteristic impedance of the transmission line is made from 50.27 Ω at the side of the coaxial cable to 50.57 Ω at the microstrip line side, as shown in FIG 8 (a) is not increased by 0.3 Ω at the connection point, but is reduced by approximately 0.6 Ω to 49.68 Ω, and is then increased to approximately 50.8 Ω, that is, via the impedance of the microstrip line. transmission line. Likewise, when connection is made from the characteristic impedance of the transmission line of 50.57 Ω on the side of the microstrip line to 50.27 Ω on the side of the coaxial cable, as in FIG 8 (b) is not reduced from 50.57 ohms on the side of the microstrip line by 0.3 ohms to 50.27 ohms on the side of the coaxial cable, but is reduced by approximately 0.6 ohms to 49.99 ohms at the connection point and is then increased to 50.85 Ω, that is, above 50.27 Ω. It can be said that, as described above, when transmission lines of different shapes are connected to each other, since the physical shapes that determine the characteristic impedances of the transmission lines affect each other at the connection portion, the impedance matching collapses.

Z₀:

Charakteristische Impedanz in jeder Übertragungsleitung

Z:

minimale Impedanz an Änderungspunkt

The following will consider the effect of a characteristic impedance change described above on a signal propagating through a transmission line. In the example described above, a change in the impedance of 1.1 Ω is shown at the connection point on the side of the microstrip line, and a change in the impedance of approximately 0.8 Ω is shown on the side of the coaxial cable. The change in impedance can be used in the following expressions for a reflection factor (return loss). Expression 6

Z ₀ :

Characteristic impedance in each transmission line

Z:

minimum impedance at change point

When the characteristic impedance of each TDR waveform before and after the connection point (each transmission line) and the minimum impedance at the connection point are set in the above calculation terms and calculations are performed, the maximum reflection factor Γ is 0.012 and the minimum reflection factor is 0.008. Based on the reflection factors, the voltage-return loss of the input signal is determined to a maximum of 19.21 dB and a minimum of 20.97 dB. As a ratio, approximately 1/100 of the voltage is reflected and thus not transmitted.

This is a very small loss only in terms of the numerical value. However, it is described that, even when transmission lines are connected to each other, which have almost the same characteristic impedance, a signal is not transmitted to 100% and in any case reflections occur. For example, when HDMI (Registered Trade Mark), that is, a standard for high-speed transmission of digital signals, is used for illustration, in a case where the characteristic impedance of the transmission line is 100 Ω and a change in impedance in FIG Transmission line ± 25 Ω (125 Ω or 75 Ω), a reflection factor Γ at 125 Ω is 0.11 and a return loss is approximately 9.59 dB, and a reflection factor Γ at 75 Ω is 0.14 and a return loss is 8.54 dB, so that a 1/10 energy is not transmitted, but lost.

Since a point at which impedance changes occurs at every point where the shape of the transmission line changes, all reflections must occur at several to several ten points of change existing in the transmission lines, such as connectors installed on a board are taken into account, terminal portions, at which male and female connectors are mated, at a connecting portion of a connector and a cable, and the like. Furthermore, as also described above in the section "Elements analyzed by means of electromagnetic simulation analysis", losses due to the insulator are included. Therefore, it is obvious that a change in the impedance at each point must be restricted as much as possible.

Model of electromagnetic simulation analysis

• Verbinder-Anschlussabschnitt: drei Punkte (zwei Punkte für Anschluss von Leiterplatte und ein Punkt für Zwischenverbindung)
• Gesamtkabellänge: 5 m
• Durchmesser des Mittelleiters des Kabels: Draht Nr. 26 AWG (relative Dielektrizitätskonstante des Isolators ε_r: 2, dielektrische Verlusttangente tanδ: 0,0002)
• Typ des Kabels: abgeschirmtes Differential-Pair-Kabel (SATA type double drain)
• Gesamt-Übertragungsverlust: innerhalb von 1/8 (Spannungsverlust von 9,0309 dB) der Amplitude der Grundwelle an dem Empfangsende
• Impedanz der Übertragungsleitung: 100 Ω (Differential)

9 represents a transmission line that serves as a model for performing an electromagnetic simulation analysis. In 9 are the two microstrip lines 50 each via PCB connector 91 with the coaxial cables 40 connected, and the two coaxial cables 40 are via an interconnector 92 connected with each other. Furthermore, a point a in 9 a connection point of the signal line 51 the microstrip line 50 and the connection of the PCB connector 91 at the side of the circuit board, a point b represents a connection point of the terminal of the circuit board connector 91 on the side of the PCB and the connector of the PCB connector 91 at the side of the cable, a point c represents a connection point of the terminal of the circuit board connector 91 on the side of the cable and the inner conductor 41 of the coaxial cable, and represents a point d any point on the coaxial cable 40 Further details of the transmission line in 9 are described below.

• Connector connection section: three points (two points for connection of circuit board and one point for interconnection)
• Total cable length: 5 m
• Diameter of the center conductor of the cable: Wire No. 26 AWG (relative dielectric constant of the insulator ε _r : 2, dielectric loss tangent tanδ: 0.0002)
• Type of cable: shielded differential pair cable (SATA type double drain)
• Total transmission loss: within 1/8 (voltage loss of 9.0309 dB) of the amplitude of the fundamental at the receiving end
• Transmission line impedance: 100 Ω (differential)

As described above in the section "Energy loss due to impedance mismatching", when calculations are made in a case where εr of PTFE in wire No. 26 is AWG 2 and the tanδ thereof is 0.0002, the loss on the single cable is (d) about 1.5724 dB / m and attenuation of 7.8620 dB occurs in a 5 m long transmission line. The acceptable level of loss at the connector section (ax2 + bx3 + cx4) is 1.1689 dB and is determined by subtracting the loss of 7.8620 dB of only the cable from the total transmission loss of 9.0309 dB.

Of the three types of connection points of points a, b, and c, points a and c are connection points of the disk connector 91 and the coaxial cable 40 or the microstrip line 50 and differ from the fitting points of the connector to which the terminal connection structure of the present invention is applied. Here, for each of points a and c, ideal impedance connection is assumed, and it is assumed that at each point there is the maximum amount of impedance change of 1.1Ω as discussed above in the section on return loss.

Z₀:

Charakteristische Impedanz in jeder Übertragungsleitung

Z:

minimale Impedanz an Änderungspunkt

|Γ| = 98.9 – 100 / 98.9 + 100 = 0.0055, |Γ| = 101.1 – 100 / 101.1 + 100 = 0.0055 –10 log( 1 / 1 – 0.0055) = 0.0239 [dB], 0.0239 × 6_Punkte × 2-_mal = 0.2868[dB] The number of points a is two, and the number of points c is four. Therefore, the sum of the number of points a and c gives 6, and it is assumed that there are two reflections due to an increase and a decrease in the impedance at each of the points, and the reflections are converted into the loss of the amplitude (voltage) of a signal, In this case, the return loss is determined as follows. Expression 7

Z ₀ :

Characteristic impedance in each transmission line

Z:

minimum impedance at change point

| Γ | = 98.9 - 100 / 98.9 + 100 = 0.0055, | Γ | = 101.1 - 100 / 101.1 + 100 = 0.0055 -10 log (1/1 - 0.0055) = 0.0239 [dB], 0.0239 × 6 _points × 2 _times = 0.2868 [dB]

Therefore, the acceptable total attenuation value at the three points of the connector mating portions of the points b is 0.8821 dB, and is found by subtracting 0.2868 dB from the amount of attenuation of 1.1689 dB that is acceptable at the connector portion and the acceptable loss at the connector mating section is 0.294 dB, that is 1/3 thereof. When a reverse operation is performed to determine the value Ω of the acceptable change in impedance from the 0.2440 dB acceptable amount of attenuation determined here, due to a change in impedance at the connector mating portion, a single change in impedance range is 88 Ω and 114 Ω with a reflection factor Γ of 0.0655 acceptable. Moreover, when a plurality of changes occur, determination can be made on the basis of an amount of attenuation that is detected by synthesizing a lower amount of change in impedance and the number of changes.

Results of Analysis and Explanation of Related Art Fork Connection Receptacle Terminal Structure

As the shape of a transmission line changes, as described above, the impedance changes, reflections occur and loss of the transmission signal occurs. This is subjected to electromagnetic simulation analysis using a model in which a two-edge connector, which is a related-art tuning fork-shaped connector, is used at point b of the "model for electromagnetic simulation analysis" described above. 10 (a) to 10 (e) represent models for electromagnetic simulation analysis and results of the analysis of the models. 10 (a) to 10 (e) 12 show the analysis results of the electromagnetic simulation analysis performed by variously changing the arrangement and shapes of the two-edge (receiving) terminals and a terminal (insertion terminal) therebetween.

11 schematically shows the dimensions of the terminals in the examples in 10 (a) to 10 (e) , The left and the right side in 11 serve as terminals that allow a high-frequency signal to oscillate and have each been set to a differential characteristic impedance of 100 Ω. The pitch of the terminals, the properties of the enclosing insulator material, and the like were determined using a method of performing a stripline. The structure of the strip line will be further described below with reference to FIG 11 described.

10 (a) and 10 (b) exemplify a state in which a tongue-fitting portion projecting vertically and extending in the form of a flat plate with respect to an insertion port body is positioned between the terminals with two edges projecting vertically and with respect to one another Shaping terminal body in the form of a flat plate, and it comes into contact with the terminals with two edges. In 10 (a) the tongue terminal portion and the contact terminal portions project vertically upward (upper side in FIG 10 (a) ). 10 (a) and 10 (b) differ from each other in terms of the depth at which the tongue-fitting portion penetrates between the two-edge terminals. This means, 10 (a) shows a small depth of penetration of the tongue-connection portion between the two-edge terminals, and 10 (a) shows a great depth of penetration of the tongue-connection portion between the two-edge terminals. Furthermore, the in 10 (c) and 10 (d) shown models of the insertion port body and the receiving terminal body in the form of a flat plate in the model in 10 (b) rotated by 90 ° and -90 ° around its longitudinal direction. 10 (c) exemplifies a state in which the insertion port and the receiving port are rotated so that the insertion port body of the insertion port and the receiving port body of the receiving port are away from each other. Furthermore, it represents 10 (d) model a state in which the insertion port and the receiving port are rotated so that the insertion port body of the insertion port and the receiving port body of the receiving port are close to each other. This in 10 (e) Model shown is a model in which the insertion port body and the receiving terminal body in the form of a flat plate in the model in 10 (b) are rotated in the same direction by 90 °.

A frame F of the TDR diagram to the right of 10 (a) to 10 (e) shows an observation area, and the area outside (left and right) of the frame F shows a target impedance of a signal excitation terminal. TDR was calculated with a rise time of 35 ps. This is because the rise time is a rise time corresponding to "10 GHz" in the required band calculation section described above (in order to obtain sufficient accuracy of the analysis, a frequency band of a multiple of 5 GHz, that is, the fundamental, set at 10 Gbps).

In 10 (a) Flat portions in front of and behind a point where the tongue terminal portion of the insertion terminal and the terminals of the female terminal come into contact with each other at two edges have an impedance of about 93 Ω. At the contact point, the thickness direction of the terminal is increased from 0.2 mm to 1 mm and the characteristic impedance is reduced by 30 Ω to approximately 63 Ω.

In 10 (b) For example, the impedance at the contact point at the flat portions before and after the point where the tongue terminal portion of the insertion terminal and the terminal of the female terminal with two edges come into contact with each other is reduced from 93Ω at the contact point by 30Ω to 63Ω , and then the impedance is increased to 104Ω because the terminals of the lead-in terminal project upright with two edges (the space between the two-edge terminals is open).

In 10 (c) For example, the space between the female terminal plates in the form of flat plates of the female terminal is wide open, and therefore, the impedance increases to about 130 Ω. However, at the point where the tongue terminal of the insertion terminal and the terminals of the female terminal come into contact with each other with two edges, the terminals approach each other abruptly, and so the impedance becomes as in 10 (a) or 10 (b) reduced by about 70 Ω to 63 Ω.

In 10 (d) The distance between the receiving terminal bodies in the form of flat plates of the female terminal approaches the distance and the height (thickness) at the point where the tongue terminal portion of the insertion terminal and the terminals of the female terminal come into contact with each other, and thereby the transition range of 63 Ω is considerably extended.

In 10 (e) the dimensions show a shape in which the side of the insertion port and the side of the receiving port in 10 (b) are reversed, and the TDR results also show a reverse characteristic.

t:

Dicke innerer Leiter

w:

Breite innerer Leiter

s:

Abstand innerer Leiter

b:

Dicke des dielektrischen Materials

m:

Abstand zu Wandfläche

εr:

relative Dielektrizitätskonstante

εo:

Dielektrizitätskonstante im Vakuum

ε:

εo × εr

From the above results, it can be seen that the thickness (height) of the insertion port and the receiving port are changed and the impedance is drastically reduced. Furthermore, it can also be seen that as the pitch of the terminals between the insertion terminal body and the receiving terminal body in the form of a flat plate is increased, the impedance is drastically increased. Such a change of the impedance is a phenomenon normal in the stripline structure. A stripline is a transmission line in a medium between an upper and a lower conductor and is generally based on 12 and the expression given below. An in 12 shown stripline 120 consists of two inner ladders 121 , a dielectric material 122 that is each of the inner ladder 121 covering, as well as an outer conductor 123 that is the dielectric material 122 covers. Expression 8

t:

Thick inner conductor

w:

Width inner conductor

s:

Distance between inner conductors

b:

Thickness of the dielectric material

m:

Distance to wall surface

.epsilon..sub.R:

relative dielectric constant

εo:

Dielectric constant in vacuum

ε:

εo × εr

From the above expressions it can be seen that the total capacitive coupling C _{o, o} of C _fo (capacitive coupling between differential signals), C _p (capacitive coupling between signal line and upper and lower ground) and C _fom (capacitive coupling between signal wall and wall surface) is inversely proportional to the impedance. That is, if the gap S between the inner conductors 121 is reduced or the thickness t of the inner conductor 121 is increased, the capacitive coupling between the lines is increased and causes a reduction of the impedance. From this, it can be seen that a change in the thickness of the insertion port and the receiving port, which are arranged at a predetermined clearance in a connector causes a change of the characteristic impedance. Furthermore, it can also be seen that when the thicknesses of the insertion port and the receiving port are large, the impedance is more influenced by the distance between the leads.

Regardless, if the width w of the inner conductor changes 121 is changed, not the capacitance between the lines, but the capacitance (C _p ) between the upper and the lower outer conductor 123 , For example, if the width w of the inner conductor 121 is increased, C _{p is} increased. As the width w is reduced, C _p is also decreased. This is the width w of the inner conductor 121 also inversely proportional to the impedance.

From this, it can be seen that a structure in which the thickness, the width, the distance between the leads of the insertion port and the female terminal in a connector and the like at a contact point where the insertion port and the female terminal come into contact with each other are so little as possible, is preferable for digital high-speed transmission at a rate of several Gbps.

Effects of the Terminal Connection Structure of the Present Invention

Considering the problem of the related art based on the description of the definition of the high-speed digital transmission and the behavior of impedance in the connector, It can be seen that a change in impedance due to the shape of the insertion port and the receiving port in the interfitting and the distance between the terminals and the shape of the same before and after the fitting together is inevitable. Therefore, the related art is believed to be suitable for high-speed digital transmission at a rate of several Gbps.

In the terminal connection structure of the present invention, when the insertion port 12 and the recording connection 13 be used as they are with reference to 1 to 2 B) It is possible to obtain excellent electrical characteristics which are not possible with the terminal connecting structure including the related art tuning fork-shaped female terminal.

13 FIG. 12 shows results of the transmission loss test in the terminal connection structure of the present invention. FIG. A frame F on the right in 13 shown TDR diagram shows an observation area, and the area outside (left and right) of the frame F shows a target impedance of a signal excitation terminal. TDR was calculated with a rise time of 35 ps.

If the tuning fork-shaped female connector of the related art, as in 10 (a) As described above, as described above, the characteristic impedance decreased by 30 Ω to approximately 63 Ω. Further, when the return loss is calculated at this characteristic impedance, a voltage-return loss is 6.44 dB, and only thereby does a passage loss of 1.1182 dB be generated. That is, due to the mating of terminals at one point, substantially the same loss as that of 1.1669 dB, which is defined as the acceptable amount of loss in the entire connector portion, occurs. Thus, it has proved difficult to apply the related art to a high-speed digital transmission line assuming a rate of 10 Gbps.

In contrast, in the terminal connection structure of the present invention, as in FIG 13 shown, since it is allowed that the insertion 12 and the recording connection 13 in the same plane and come into contact with each other, the characteristic impedance at the connector is substantially constant and ideal characteristics are achieved substantially without reflection. A width of the impedance change in the transmission line in the connector is vertically about 1 Ω with respect to 96.5 Ω, and thus, with a voltage return loss of 33 dB, the passage voltage loss is 0.022 dB. It can thus be seen that a smaller amount of return loss is achieved than the ideal connection between a coaxial cable and a microstrip line in the results.

That is, in the port connection structure 11 According to the present invention, the terminal shapes of the insertion port 12 and the receiving connection 13 are considered to be the same as those of a differential stripline type transmission line. In the connection connection structure 11 According to the present invention, which can be treated as a differential stripline type transmission line as described above, a change of the physical shape is restricted at the point where the insertion terminal 12 and the recording connection 13 be fitted into each other. Due to a small change in shape, the terminal connection structure according to the present invention has excellent electrical characteristics.

Further, in the terminal connection structure with the related art tuning fork-shaped female terminal, signal current is concentrated from the ends of the tuning fork-shaped female terminal to the insertion terminal. In the present invention, however, a straight path of the signal current can be maintained, which helps to limit the deterioration of the electrical characteristics.

Further, in the terminal connection structure of the present invention, when the insertion port 12 and the recording connection 13 be nested, the contact sections 33 located in the contact terminal sections 32 of the recording connection 13 are formed, in contact with the tongue connection portion 22 of the insertion port 12 , and thus a good conduction state can be achieved.

Continue beating when the insertion port 12 and the recording connection 13 be mated, the contact terminal sections 32 of the recording connection 13 at the engagement projections 23 of the insertion port 12 at. Accordingly, a shape is achieved which is advantageous for the characteristics of a high-frequency wave that flows through the surface or the edge of a transmission line.

That is, the front end portions of the contact terminal portions 32 of the recording connection 13 hit the engagement protrusions 23 the insertion port body 21 of the insertion port 12 on, and the contact terminal sections 32 of the recording connection 13 be through the guide surface sections 24 to the middle side of the insertion port 12 pressed. Accordingly, the contact portions 33 the contact terminal sections 32 to the lateral surfaces of the tongue connection section 22 pressed and in close contact with them, and thus reliable conduction is achieved.

The present invention is not limited to the above-described embodiments, and corresponding modifications, improvements and the like may be made. Furthermore, the materials, shapes, dimensions, number, arrangement positions of the components and the like in the above-described embodiments can be arbitrarily selected and are not limited insofar as the present invention can be implemented.

• [1] Eine Anschluss-Verbindungsstruktur (11), wobei die Anschluss-Verbindungsstruktur (11) einen Einführanschluss (12) mit einem Aufnahmeanschluss (13) verbindet, und der Einführanschluss (12) umfasst: einen Einführanschluss-Körper (21), der in Form einer flachen Platte ausgebildet ist; und einen Zungen-Anschlussabschnitt (22), der sich von einem vorderen Ende des Einführanschluss-Körpers (21) aus in einer Richtung zur Verbindung mit dem Aufnahmeanschluss (13) in der gleichen Ebene erstreckt wie der Einführanschluss-Körper (21), wobei der Aufnahmeanschluss (13) umfasst: einen Aufnahmeanschluss-Körper (31), der in Form einer flachen Platte ausgebildet ist; sowie ein Paar Kontakt-Anschlussabschnitte (32), die sich von einem vorderen Ende des Aufnahmeanschluss-Körpers (31) aus in einer Richtung zur Verbindung mit dem Einführanschluss in der gleichen Ebene erstrecken wie der Aufnahmeanschluss-Körper (31), und wobei der Zungen-Anschlussabschnitt (22) des Einführanschlusses (12) zwischen den paarigen Kontakt-Anschlussabschnitten (32) des Aufnahmeanschlusses (13) in der gleichen Ebene wie der Ebene positioniert ist, in der sich die Kontakt-Anschlussabschnitte (32) erstrecken, und der Zungen-Anschlussabschnitt (22) an den paarigen Kontakt-Anschlussabschnitten (32) anliegt.
• [2] Die Anschluss-Verbindungsstruktur (11), wie sie in [1] beschrieben ist, wobei Kontaktabschnitte (33), die in Richtungen vorstehen, in denen sie einander zugewandt sind, in den Kontakt-Anschlussabschnitten (32) ausgebildet sind.
• [3] Die Anschluss-Verbindungsstruktur (11), wie sie in [1] oder [2] beschrieben ist, wobei Eingriffsvorsprünge (23), die an den Kontakt-Anschlussabschnitten (32) anliegen, in dem Einführanschluss-Körper (21) ausgebildet sind.
• [4] Die Anschluss-Verbindungsstruktur (11), wie sie in [3] beschrieben ist, wobei die Eingriffsvorsprünge (23) umfassen: Führungsflächenabschnitte (24), die vordere Endabschnitte der Kontakt-Anschlussabschnitte (32) zur Seite des Zungen-Anschlussabschnitts (22) hin verschieben.

The features of the embodiments of the terminal connection structure according to the present invention as described above are briefly listed in the following items [1] to [4].

• [1] A connection connection structure ( 11 ), the connection structure ( 11 ) an insertion port ( 12 ) with a receiving connection ( 13 ) and the insertion port ( 12 ) comprises: an insertion port body ( 21 ) formed in the form of a flat plate; and a tongue connection section ( 22 ) extending from a forward end of the insertion port body ( 21 ) in one direction for connection to the receiving port ( 13 ) extends in the same plane as the insertion port body ( 21 ), whereby the receiving connection ( 13 ) comprises: a receiving terminal body ( 31 ) formed in the form of a flat plate; and a pair of contact terminal sections ( 32 ) extending from a front end of the female connector body ( 31 ) extend in a direction for connection to the insertion port in the same plane as the receiving port body (FIG. 31 ), and wherein the tongue connection section ( 22 ) of the insertion port ( 12 ) between the paired contact terminal sections ( 32 ) of the receiving connector ( 13 ) is positioned in the same plane as the plane in which the contact terminal sections ( 32 ), and the tongue connection portion ( 22 ) at the paired contact terminal sections ( 32 ) is present.
• [2] The connection structure ( 11 ), as described in [1], wherein contact sections ( 33 ) protruding in directions in which they face each other in the contact terminal portions (FIG. 32 ) are formed.
• [3] The connection structure ( 11 ) as described in [1] or [2], wherein engagement projections ( 23 ) at the contact terminal sections ( 32 ), in the insertion port body ( 21 ) are formed.
• [4] The connection structure ( 11 ), as described in [3], wherein the engagement projections ( 23 ) include: guide surface sections ( 24 ), the front end portions of the contact terminal portions ( 32 ) to the side of the tongue connecting portion ( 22 ).

Although the present invention has been described in detail with reference to the specific embodiments, it should be appreciated by those skilled in the art that various changes and modifications may be additionally made without departing from the spirit and scope of the present invention.

The present application is based on a Japanese patent application filed on Jul. 19, 2013 ( Japanese Patent Application No. 2013-150886 ), the contents of which are hereby incorporated by reference.

Industrial applications

The terminal connection structure of the present invention enables high-speed digital transmission and can achieve good electrical characteristics. The present invention having the effects is suitable for use in the field of terminals.

LIST OF REFERENCE NUMBERS

11

Terminal connection structure

12

introduction port

13

receiving port

21

Insertion port body

22

Tongues terminal portion

23

engaging projection

24

Guide surface section

31

Female terminal body

32

Contact terminal portion

33

Contact section

40

coaxial

41

inner conductor

42

insulator

43

outer conductor

50

Microstrip line

51

signal line

52

insulator

53

Dimensions

Claims (4)

Terminal connection structure, wherein the terminal connection structure connects an insertion port to a reception port, and the insertion port includes: an insertion port body formed in the form of a flat plate; and a tongue terminal portion extending from a front end of the insertion port body in a direction for connection to the female terminal in the same plane as the insertion port body, wherein the receiving terminal comprises: a female terminal body formed in the form of a flat plate; such as a pair of contact terminal portions extending from a front end of the female terminal body in a direction for connection to the insertion terminal in the same plane as the female terminal body, and wherein the tongue terminal portion of the insertion terminal is positioned between the pair of contact terminal portions of the female terminal in the same plane as the plane in which the contact terminal portions extend, and the tongue terminal portion abuts on the paired terminal contact portions. The terminal connection structure according to claim 1, wherein contact portions projecting in directions in which they face each other are formed in the contact terminal portions. A terminal connecting structure according to claim 1 or 2, wherein engagement projections which abut against the contact terminal portions are formed in the insertion terminal body. Terminal connection structure according to claim 3, wherein the engagement projections comprise: Guide surface portions that move front end portions of the contact terminal portions toward the tongue terminal portion side.

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